Msd 8920 Tach Adapter Wiring Diagram. If this occurs bypass the filter. If you have an msd box itll have a terminal for a tach that will work along with an msd 8920 tach adapter to power your factory tach.
Splice the red wire from the pn 8910 into the msds red switched 12 volts wire. April 5th 2019 msd 6al tach wiring diagram ebook msd 6al. If you are using the magnetic pickup input green and violet wires to trigger your msd ignition you will need the pn 8920 tach adapter.
The tach worked before the install.
It is a current triggered tachometer. Foreign vehicles due to the fuel injection systems some foreign vehicles may require a special tachfuel injection adapter to use an msd ignition. If you are using the magnetic pickup input green and violet wires to trigger your msd ignition you will need the pn 8920 tach adapter. I had a no spark condition.